/*
 * SonarQube Java
 * Copyright (C) 2012-2018 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.java.xml;

import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

import javax.annotation.CheckForNull;

public final class XmlCheckUtils {

  private XmlCheckUtils() {
  }

  @CheckForNull
  public static Integer nodeLine(Node node) {
    Node lineAttribute = nodeAttribute(node, XmlParser.START_LINE_ATTRIBUTE);
    if (lineAttribute != null) {
      return Integer.valueOf(lineAttribute.getNodeValue());
    }
    return null;
  }

  @CheckForNull
  public static Node nodeAttribute(Node node, String attribute) {
    NamedNodeMap attributes = node.getAttributes();
    if (attributes == null) {
      return null;
    }
    return attributes.getNamedItem(attribute);
  }

}
